A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is he concentrations of chloride ion in the two compartments are 0.0222 M and 2.22 M, respectively. The cell emf is V. g

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?